package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.R;
import com.itheima.reggie.entity.ShoppingCart;
import com.itheima.reggie.service.ShoppingCartService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.time.LocalDateTime;
import java.util.List;

@Slf4j
@RestController
@RequestMapping("/shoppingCart")
public class ShoppingCartController {
    @Autowired
    private ShoppingCartService shoppingCartService;


    @PostMapping("/add")
    public R<ShoppingCart> addCart(@RequestBody ShoppingCart shoppingCart) {
        log.info("购物车数据:{}", shoppingCart);
        //设置用户id，指定当前是哪个用户的购物车数据
        Long currentId = BaseContext.getCurrentId();
        shoppingCart.setUserId(currentId);
        Long dishId = shoppingCart.getDishId();
        LambdaQueryWrapper<ShoppingCart> qw = new LambdaQueryWrapper<>();
        qw.eq(ShoppingCart::getUserId, currentId);
        if (dishId != null) {
            //添加到购物车的是菜品
            qw.eq(ShoppingCart::getDishId, dishId);
        } else {
            //添加到购物车的是套餐
            qw.eq(ShoppingCart::getSetmealId, shoppingCart.getSetmealId());
        }
        //查询当前菜品或者套餐是否在购物车中
        //SQL:select * from shopping_cart where user_id = ? and dish_id/setmeal_id = ?
        ShoppingCart cartServiceOne = shoppingCartService.getOne(qw);
        if (cartServiceOne != null) {
            //如果已经存在，就在原来数量基础上加一
            Integer number = cartServiceOne.getNumber();
            cartServiceOne.setNumber(number+1);
            shoppingCartService.updateById(cartServiceOne);
        }else {
            //如果不存在，则添加到购物车，数量默认就是一
            shoppingCart.setNumber(1);
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCartService.save(shoppingCart);
            cartServiceOne = shoppingCart;
        }
        return R.success(cartServiceOne);
    }
    @GetMapping("/list")//查询购物车
    public R<List<ShoppingCart>> list(){
        log.info("查询购物车");
        LambdaQueryWrapper<ShoppingCart> qw = new LambdaQueryWrapper<>();
        qw.eq(ShoppingCart::getUserId,BaseContext.getCurrentId());
        qw.orderByAsc(ShoppingCart::getCreateTime);
        List<ShoppingCart> list = shoppingCartService.list(qw);
        return R.success(list);
    }
    @PostMapping("/sub")
    public R<ShoppingCart> cancel(@RequestBody ShoppingCart shoppingCart){
        LambdaQueryWrapper<ShoppingCart> qw = new LambdaQueryWrapper<>();
        qw.eq(ShoppingCart::getUserId,BaseContext.getCurrentId());
        Long dishId = shoppingCart.getDishId();
        if (dishId != null) {
            qw.eq(ShoppingCart::getDishId,dishId);
        }else {
            qw.eq(ShoppingCart::getSetmealId,shoppingCart.getSetmealId());
        }

        ShoppingCart cartServiceOne = shoppingCartService.getOne(qw);
        Integer number = cartServiceOne.getNumber();
        number--;
        cartServiceOne.setNumber(number);;
        if (number>0) {
            shoppingCartService.updateById(cartServiceOne);
        }else {
            shoppingCartService.remove(qw);
        }
        return R.success(cartServiceOne);
    }
    @DeleteMapping("clean")
    public R<String> clean(){

        LambdaQueryWrapper<ShoppingCart> qw = new LambdaQueryWrapper<>();
        qw.eq(ShoppingCart::getUserId,BaseContext.getCurrentId());
        shoppingCartService.remove(qw);
        return R.success("清空购物车成功");
    }



}
